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Finding the Fourth Proportional to 309,468.63, 426,674.26 and 221,169.36

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Solution

The fourth proportional to 309,468.63, 426,674.26 and 221,169.36 is: 304,933.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,468.63 : 426,674.26 = 221,169.36 : x
  2. Step 2: Convert to fraction form
    309,468.63/426,674.26 = 221,169.36/x
  3. Step 3: Cross multiply
    309,468.63x = 426,674.26 × 221,169.36
  4. Step 4: Simplify right side
    309,468.63x = 94,367,273,067.10
  5. Step 5: Solve for x
    x = 94,367,273,067.10/309,468.63
  6. Step 6: Final answer
    x = 304,933.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.